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Title: Photoluminescence and photothermal effect of Fe{sub 3}O{sub 4} nanoparticles for medical imaging and therapy

Photoluminescence (PL) of Fe{sub 3}O{sub 4} nanoparticle was observed from the visible to near-infrared (NIR) range by laser irradiation at 407 nm. PL spectra of ∼10 nm diameter Fe{sub 3}O{sub 4} nanoparticles organized in different spatial configuration, showed characteristic emissions with a major peak near 560 nm, and two weak peaks near 690 nm and 840 nm. Different band gap energies were determined for these Fe{sub 3}O{sub 4} nanoparticle samples corresponding to, respectively, the electron band structures of the octahedral site (2.2 eV) and the tetrahedral site (0.9 eV). Photothermal effect of Fe{sub 3}O{sub 4} nanoparticles was found to be associated with the photoluminescence emissions in the NIR range. Also discussed is the mechanism responsible for the photothermal effect of Fe{sub 3}O{sub 4} nanoparticles in medical therapy.
Authors:
; ; ;  [1] ;  [2] ; ;  [3] ;  [4] ;  [5] ;  [2] ;  [6]
  1. Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221 (United States)
  2. The Materials Science and Engineering Program, Department of Mechanical and Materials Engineering, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, Ohio 45221 (United States)
  3. Department of Geological and Environmental Sciences, Stanford University, Stanford, California 94305-2115 (United States)
  4. Med-X Institute, Shanghai Jiao Tong University, Shanghai 200030 (China)
  5. James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, Ohio 45267 (United States)
  6. (China)
Publication Date:
OSTI Identifier:
22311014
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ELECTRONS; EV RANGE; IRON OXIDES; LASER RADIATION; NANOPARTICLES; NEAR INFRARED RADIATION; PHOTOLUMINESCENCE; SPECTRA; THERAPY